梁端开孔钢筋混凝土框架梁受力性能的试验研究  

EXPERIMENTAL STUDYING ABOUT BEARING CAPACITY OF BEAM OF RC-FRAME WITH OPENING IN THE END

作　　者：王逢朝[1] 李振宝[2] 崔宏剑[2] 

机构地区：[1]三明学院土木建筑工程系,福建三明365004 [2]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124

出　　处：《工程力学》2011年第11期52-58,共7页Engineering Mechanics

基　　金：福建省自然科学基金项目(T0750012);福建省海西重点建设项目(HX200802)

摘　　要：高层建筑中,采用开孔梁可以有效降低建筑层高,节约建筑空间。但孔洞破坏了混凝土梁的原有受剪机理,尤其是框架梁端部开孔使梁端塑性铰区域受力变得复杂。通过对5根端部开孔的钢筋混凝土框架梁试件进行反复荷载作用下的试验,研究了在低周反复荷载作用下端部开孔梁的受力性能,分析了不同开孔尺寸和补强方式的开孔梁的破坏特征及抗震滞回性能,从而得出有效的补强配筋形式。In modern high-rise constructions, opening beams are used extensively in reducing buildings＇ storyheight and saving its space. However, the beam＇s shear mechanism is changed worse and the mechanism is intricated by opening, especially in the plastic area-the end of the beam beside the column here. By applying cycle loading, laboratory studies on the five beams of RC-frame with circular opening in the end are carried out, and the mechanical behavior of the beams of RC-frame with end circular opening are studied. The better method to enforce the opening beams is presented by analysing the failure properties and anti-seismic hystereticcharacteristics of opening beams with different opening size and reinforced methods.

关 键 词：钢筋混凝土开孔梁 低周反复荷载 破坏特征 承载力 滞回曲线 

分 类 号：TU375.1[建筑科学—结构工程]